Family dynamics and child outcomes in early intervention: the role of developmental theory in the specification of effects

Evaluations of early intervention for children facing biological and/or socioeconomic risk have tended to focus most directly on change in the child, treating family variables primarily as mediators of change. In contrast, the current study used developmental theory to articulate hypotheses that address one way in which a focus on the relationship between mother and child may be related to intervention efficacy. This study examined maternal control strategy and child compliance as a function of early intervention beginning at birth for low birth weight, preterm infants and their families and related these aspects of mother–child interaction to behavioral outcomes at age 3 (n=645). Overall, mothers receiving early intervention were no more likely to use a preferred control strategy, guidance orientation, in a structured compliance task than were mothers participating in a follow-up only condition. However, an association between early intervention and maternal guidance was observed among mothers of children who were consistently noncompliant during the task. As a result, maternal guidance as observed in the compliance interaction was associated with reduced externalizing and internalizing behavior at program end for children participating in the intervention but not the follow-up only condition. Findings highlight the value of focusing on the mother–child dyad and illustrate one way in which developmental theory can assist in the specification of treatment effects.     

A Comparative Study of Electronic Performance Support Systems

ABSTRACT Electronic performance support systems (EPSS) deliver relevant support information to users while they are performing tasks. The present study examined the effect of different types of EPSS on user performance, attitudes, system use and time on task. Employees at a manufacturing company were asked to complete a procedural software task and received support from either an intrinsic, extrinsic, external performance support system or no system at all. Results revealed significant differences on performance, attitudes and use between several treatment groups. The study suggests that providing any kind of EPSS to support task performance is better than having none at all. In addition, designers can improve user performance, attitudes and use by creating systems that integrate with the primary work interface.     

Voices from the bridge: Worldview conflicts of Kickapoo students of science

The purpose of this study was to compare the worldview of Native American students of the Traditional Kickapoo Band with the worldview encountered in the science classroom. The qualitative study investigated the worldview expressed in science instruction by conducting periodic observations in two classrooms over an 18-month period, teacher interviews, and text evaluations. StudentsÕ worldviews were investigated during individual and group interviews, classroom observations, science activities, and social interaction. Twenty-eight Kickapoo students, two teachers, and eight nonteaching members of the community participated in the study. Adult members of the Kickapoo Band were interviewed and asked to reflect on the educational and cultural norms of the students. A variable-oriented analysis revealed differences in epistemology, preferred methods of teaching/learning, values, spatial/temporal orientation, cultural rules for behavior, and perspective of the place of humans in the natural world. The study revealed significant worldview differences, none of which would prevent Kickapoo students from being full participants in the scientific community, but many of which may be preventing them from being successful in the science classroom. © 1998 John Wiley & Sons, Inc. J Res Sci Teach 35: 111–132, 1998.     

Making sense of reports on the incidence of behavior disorders/emotional disturbance in school-aged populations

A review of estimates of the incidence of emotional disturbance/problem behavior in school-aged children leads to the conclusion that schools should anticipate a need for alternative programming for the 2–3% of their students predicted to have recurrent or persistent problems in adjusting to school situations. In addition, there is a need to assist teachers in dealing with the stresses created by the high incidence of transient problem behavior affecting 25–30% of the total school population. Some programming possibilities are suggested.     

Maximum oxygen uptake and body composition of healthy Hong Kong Chinese adult men and women aged 20 - 64 years

The aims of the present study were to assess the maximal oxygen uptake and body composition of adult Chinese men and women, and to determine how these variables relate to age. The cross-sectional sample consisted of 196 men and 221 women aged 20 - 64 years. Maximal oxygen uptake (VO2max) was determined by indirect calorimetry during a maximal exercise test on an electrically braked cycle ergometer. The correlations between VO2max and fat mass were -0.52 in men and -0.58 in women. Linear regression defined the cross-sectional age-related decline in VO2max as 0.35 ml kg(-1) min(-1) year(-1) in men and 0.30 ml kg(-1) min(-1) year(-1) in women. Multiple regression analysis showed that more than 50% of this cross-sectional decline in VO2max was due to fat mass, lean mass, and age. Adding fat mass and lean mass to the multiple regression models reduced the age regression mass from 0.35 to 0.24 ml kg(-1) min(-1) year(-1) in men and from 0.30 to 0.15 ml kg(-1) min(-1) year(-1) in women. We conclude that age, fat mass, and lean mass are independent determinants of maximal oxygen uptake in Chinese adults.